Composite Area with Rectangles and Triangles
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Objective
I can find the area of composite figures by breaking them into rectangles and triangles.
Part 1 of 4
Warm-up video
Math with Mr. J · 6:03Vetted channel
We don't generate video — this one is by Math with Mr. J on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
To find the area of a composite figure, separate the figure into simpler shapes like rectangles and triangles.
- 2
The formula for the area of a triangle is base x height ÷ 2, and the formula for the area of a rectangle is length x width.
- 3
After finding the area of each individual shape, add the areas together to find the total area of the composite figure.
Part 3 of 4
Practice
9 questions
Explain how to find the area of a composite figure made of rectangles and triangles.
A composite figure is made of a rectangle and a right triangle. The rectangle has a length of 10 cm and a width of 6 cm. The triangle's base is 6 cm and its height is 4 cm. What is the total area of the composite figure?
Part 4 of 4
Exit ticket
Quick comprehension check
“A composite figure is made of a rectangle and a right triangle. The rectangle has a length of 8 inches and a width of 5 inches. The triangle's base is 8 inches, and its height is 3 inches. What is the total area of the composite figure?”
Sample answer included in the free materials
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Teacher Guide
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